CN116023738A - Regenerated packaging material - Google Patents
Regenerated packaging material Download PDFInfo
- Publication number
- CN116023738A CN116023738A CN202211220610.3A CN202211220610A CN116023738A CN 116023738 A CN116023738 A CN 116023738A CN 202211220610 A CN202211220610 A CN 202211220610A CN 116023738 A CN116023738 A CN 116023738A
- Authority
- CN
- China
- Prior art keywords
- blending
- mass
- packaging material
- polylactic acid
- regenerated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000005022 packaging material Substances 0.000 title claims abstract description 35
- 238000002156 mixing Methods 0.000 claims abstract description 58
- 239000002245 particle Substances 0.000 claims abstract description 54
- 239000004743 Polypropylene Substances 0.000 claims abstract description 51
- 239000000463 material Substances 0.000 claims abstract description 50
- 238000001125 extrusion Methods 0.000 claims abstract description 45
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 44
- 239000004626 polylactic acid Substances 0.000 claims abstract description 44
- 229920003023 plastic Polymers 0.000 claims abstract description 24
- 239000004033 plastic Substances 0.000 claims abstract description 24
- 229920002635 polyurethane Polymers 0.000 claims abstract description 20
- 239000004814 polyurethane Substances 0.000 claims abstract description 20
- 229920002725 thermoplastic elastomer Polymers 0.000 claims abstract description 20
- VOWAEIGWURALJQ-UHFFFAOYSA-N Dicyclohexyl phthalate Chemical compound C=1C=CC=C(C(=O)OC2CCCCC2)C=1C(=O)OC1CCCCC1 VOWAEIGWURALJQ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000123 paper Substances 0.000 claims abstract description 16
- 239000000835 fiber Substances 0.000 claims abstract description 15
- 102100035474 DNA polymerase kappa Human genes 0.000 claims abstract description 14
- 101710108091 DNA polymerase kappa Proteins 0.000 claims abstract description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004014 plasticizer Substances 0.000 claims abstract description 14
- 239000011325 microbead Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 239000004595 color masterbatch Substances 0.000 claims abstract description 12
- 238000005469 granulation Methods 0.000 claims abstract description 9
- 230000003179 granulation Effects 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims description 20
- 239000002699 waste material Substances 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 14
- 239000003054 catalyst Substances 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 10
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 8
- 238000005809 transesterification reaction Methods 0.000 claims description 7
- 229920001747 Cellulose diacetate Polymers 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000012745 toughening agent Substances 0.000 claims description 6
- 229920006337 unsaturated polyester resin Polymers 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- JVTAAEKCZFNVCJ-UWTATZPHSA-N D-lactic acid Chemical compound C[C@@H](O)C(O)=O JVTAAEKCZFNVCJ-UWTATZPHSA-N 0.000 claims description 5
- 229940022769 d- lactic acid Drugs 0.000 claims description 5
- 229920001432 poly(L-lactide) Polymers 0.000 claims description 5
- 229920005994 diacetyl cellulose Polymers 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 4
- 238000001291 vacuum drying Methods 0.000 abstract 1
- 229920001155 polypropylene Polymers 0.000 description 44
- 239000000047 product Substances 0.000 description 12
- -1 flavoring Substances 0.000 description 9
- 239000013067 intermediate product Substances 0.000 description 8
- 238000004806 packaging method and process Methods 0.000 description 8
- 239000006260 foam Substances 0.000 description 5
- 239000008187 granular material Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000007873 sieving Methods 0.000 description 4
- 229930182843 D-Lactic acid Natural products 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 150000002148 esters Chemical group 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000012644 addition polymerization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 239000008157 edible vegetable oil Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 235000012055 fruits and vegetables Nutrition 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 235000011888 snacks Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000000606 toothpaste Substances 0.000 description 1
- 229940034610 toothpaste Drugs 0.000 description 1
Abstract
The invention relates to a regenerated packaging material, which is prepared by using PP regenerated material, polylactic acid, recycled paper fiber, polyurethane thermoplastic elastomer, dicyclohexyl phthalate, a plasticizer DINP, vitrified micro bubble, color master batch and auxiliary materials as raw materials, wherein the polylactic acid, the polyurethane thermoplastic elastomer, the dicyclohexyl phthalate and the recycled paper fiber are firstly put into ethanol for blending and stirring, and then taken out for vacuum drying; blending the obtained dried product with PP reclaimed material, plasticizer DINP and auxiliary materials, and extruding and granulating by using a double screw extruder after blending; finally, blending the obtained plastic particles with vitrified microbeads and color master batch, and carrying out secondary extrusion granulation by using another double-screw extruder after blending to obtain the particles of the finished regenerated packaging material. The regenerated packaging material prepared by the method has better structural stability, strength, toughness and adsorptivity, and is suitable for being used as a packaging material.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a method for preparing a regenerated packaging material by using waste PP plastics.
Background
Packaging (Packaging) refers to the general name of containers, materials, accessories, etc. used according to certain technical methods for protecting the product during circulation, facilitating storage and transportation, and promoting sales. Packaging is an extremely large industry, and with the continuous maturation and development of material technology in recent years, packaging materials have become extremely wide-ranging, even for packaging such as ceramics, leather, wood, silk, etc., for a series of reasons such as the gradual increase of packaging awareness and the differentiation of products pursued by enterprises.
Among the existing packaging materials, the packaging materials which are the main stream are still paper, plastic, metal, ceramic and glass. Among them, plastic material is a packaging material which has been increasingly developed in recent decades, and has been widely used in product packaging in various fields, such as toothpaste, edible oil, flavoring, cosmetics, snack foods, beverages, etc. The plastic package can be used as an external packing material and can be used as a filler, has the advantages of low cost, light weight, colorability, easy production, chemical resistance, easy molding and the like, is gradually replaced with traditional packing materials such as wood, glass, metal, ceramic and the like, and the plastic package is light, economical and easy to mold and has rich colors.
However, in the prior art, the application of plastic materials is too extensive, so that a large amount of waste plastics are generated each year, and the waste plastics not only bring about serious environmental pollution, but also cause a large amount of resource waste; as one of the major classes of plastic materials, polypropylene (PP) plastic is a polymer obtained by addition polymerization, and is a thermoplastic synthetic resin excellent in performance as a thermoplastic lightweight general-purpose plastic. The polypropylene foam beads and the polypropylene foam products sintered and formed by the polypropylene foam bead die have the advantages of good heat resistance, good dimensional stability, oil resistance, corrosion resistance and excellent buffering performance, and are excellent packaging material raw materials, and if the waste polypropylene (PP) plastic is recycled, modified and recycled after recycling, the polypropylene foam beads and the polypropylene foam products are high in economic value and social value.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a regenerated packaging material to solve the problems in the technical background.
The technical problems solved by the invention are realized by adopting the following technical scheme:
the regenerated packaging material comprises the following raw materials in parts by mass:
PP reclaimed materials: 55-70 parts by mass;
polylactic acid: 20-40 parts by mass;
and (3) recycling paper fibers: 15-30 parts by mass;
polyurethane thermoplastic elastomer: 10-15 parts by mass;
dicyclohexyl phthalate: 7-15 parts by mass;
plasticizer DINP: 10-15 parts by mass;
vitrified microbeads: 5-7 parts by mass;
color master batch: 0 to 2 parts by mass;
auxiliary materials;
the PP regenerated material is obtained in the following way: crushing the recovered PP waste particles into particles with the particle diameter of less than 3mm, cleaning the corresponding particles by high-pressure water flow, recovering and filtering, drying at low temperature, heating to a molten state, adding unsaturated polyester resin accounting for 5-7wt% of the particles as a toughening agent, blending, extruding and granulating to obtain PP regenerated materials;
the preparation method comprises the following operation steps:
s1, putting polylactic acid, polyurethane thermoplastic elastomer, dicyclohexyl phthalate and recycled paper fiber into ethanol for blending, stirring for 30-45 min at the temperature of 150-210 ℃, controlling the stirring speed to be 200-300 r/min, taking out, naturally cooling to room temperature, and vacuumizing and drying;
s2, blending the dried product obtained in the step S1 with PP regenerated material, plasticizer DINP and auxiliary materials, and extruding and granulating by using a double screw extruder after blending;
and S3, blending the obtained plastic particles with vitrified microbeads and color master batches, and carrying out secondary extrusion granulation by using another double-screw extruder after blending to obtain the particles of the finished regenerated packaging material.
As a further limitation, the polylactic acid is a proportional composition of poly L-lactic acid and poly D-lactic acid, and the weight average molecular weight of the polylactic acid is 120000g/mol to 300000g/mol.
As a further limitation, the vitrified micro bubble has compressive strength of more than or equal to 3.5MPa and particle size of 0.5-1.2 mm.
As further limitation, the auxiliary materials comprise one or a combination of cellulose diacetate grafted polylactic acid, a transesterification catalyst and an antioxidant 1076; wherein the dosage of the diacetyl cellulose grafted polylactic acid is 1.5 to 2.5 weight percent of the polylactic acid; the dosage of the transesterification catalyst is 1-3wt% of the sum of the mass of polylactic acid, polyurethane thermoplastic elastomer and dicyclohexyl phthalate; the dosage of the antioxidant 1076 is 0.3-0.5 wt% of the total mass of all raw materials.
By way of further limitation, when the blending operation is performed in step S2 and step S3, the blending temperature is 75 to 90 ℃ and the blending treatment time period is 15 to 30 minutes.
As a further limitation, in the step S2, when the twin-screw extruder is used for extrusion granulation, three-stage extrusion is performed by setting the screw rotation speed on the twin-screw extruder to 300-600 revolutions per minute, wherein the extrusion temperature of the three-stage extrusion is respectively 160-170 ℃ for 45-60S, 170-190 ℃ for 90-120S and 170-190 ℃ for 20-30S.
As a further limitation, in the step S2, when the twin-screw extruder is used for extrusion granulation, the twin-screw extruder is provided with a screw rotating speed of 300-600 revolutions/min and an extrusion temperature of 170-190 ℃ for extrusion, and the residence time of an extrusion section is 120-150S.
The beneficial effects are that: the regenerated packaging material is produced by using the PP regenerated material as a main material, has mechanical properties close to those of the PP material and a certain adsorptivity, and has a relatively stable structural form, strength and toughness through polylactic acid and polyurethane thermoplastic elastomer; meanwhile, the raw materials are cheap, the manufacturing process is simple, the cost is low, the use of the PP regenerated material and recycled paper fiber can effectively improve the environmental protection property of the packaging material, the materials can be greatly saved, and waste is changed into valuable.
Detailed Description
The present invention will be further described with reference to the following examples, which are not intended to limit the scope of the invention in any way.
Example 1
The regenerated packaging material comprises the following raw materials in mass proportion: PP reclaimed materials: 55kg, polylactic acid: 20kg, recycled paper fiber: 30kg, polyurethane thermoplastic elastomer: 10kg of dicyclohexyl phthalate: 7kg, plasticizer DINP:15kg, vitrified microbeads: 7kg, the auxiliary material is cellulose diacetate grafted polylactic acid, and the dosage of the auxiliary material is 2wt% of the polylactic acid.
The preparation method comprises the steps of firstly crushing the recovered PP waste particles into particles with the particle diameter of less than 3mm by using crushing equipment, then cleaning by using high-pressure water flow, filtering after cleaning, drying by hot air at the temperature of 60 ℃ after removing impurities by sieving to obtain PP waste particles with the purity of 95%, heating the PP waste particles into a molten state, adding unsaturated polyester resin accounting for 5wt% of the mass of the particles as a toughening agent, blending, extruding and granulating to obtain the PP regenerated material; polylactic acid is poly L-lactic acid with weight average molecular weight of 120000 g/mol-150000 g/mol; the vitrified micro bubble has compressive strength not less than 3.5MPa and particle size of 0.5-0.8 mm.
The preparation method comprises the steps of putting the polylactic acid, the polyurethane thermoplastic elastomer, the dicyclohexyl phthalate and the recycled paper fiber which are weighed according to mass into ethanol for blending, stirring for 30min at 150 ℃ under the condition of 200 r/min, taking out, naturally cooling to room temperature, and vacuumizing and drying to obtain a standby intermediate product; blending the standby intermediate product with PP reclaimed materials, a plasticizer DINP and auxiliary materials, wherein the blending temperature is controlled to be 75 ℃ in a high-speed blender for blending treatment for 30min during blending operation, and after the treatment, the mixture is fed into a double-screw extruder for melt blending and then is extruded, the rotating speed of a screw is controlled to be 500 revolutions per minute for three-section extrusion, and the extrusion temperature of the three-section extrusion is respectively 160 ℃ for 60S,170 ℃ for 120S and 170 ℃ for 20S; and then drying, cooling and granulating the extrudate to obtain plastic particles, blending the plastic particles with vitrified microbeads, performing secondary extrusion granulation by using another double-screw extruder after blending, controlling the screw rotation speed of the other double-screw extruder to be 600 revolutions per minute and the extrusion temperature to be 170 ℃ for extrusion, controlling the residence time of an extrusion section to be 150S, and then drying, cooling and granulating the extrudate to obtain the granule of the finished product regenerated packaging material.
Example two
The regenerated packaging material comprises the following raw materials in mass proportion: PP reclaimed materials: 70kg, polylactic acid: 40kg, recycled paper fiber: 15kg, polyurethane thermoplastic elastomer: 15kg of dicyclohexyl phthalate: 15kg, plasticizer DINP:10kg, vitrified microbeads: 7kg, 1kg of color masterbatch and auxiliary materials including cellulose diacetate grafted polylactic acid and an ester exchange catalyst, wherein the dosage of the cellulose diacetate grafted polylactic acid is 2wt% of the polylactic acid, and the dosage of the ester exchange catalyst is 3wt% of the mass sum of the polylactic acid, the polyurethane thermoplastic elastomer and the dicyclohexyl phthalate.
The preparation method comprises the steps of firstly crushing the recovered PP waste particles into particles with the particle diameter of less than 3mm by using crushing equipment, then cleaning by using high-pressure water flow, filtering after cleaning, drying by hot air at the temperature of 55 ℃ after removing impurities by sieving to obtain PP waste particles with the purity of 92%, heating the PP waste particles into a molten state, adding unsaturated polyester resin accounting for 7wt% of the mass of the particles as a toughening agent, blending, extruding and granulating to obtain PP regenerated materials; polylactic acid is poly-D-lactic acid with weight average molecular weight of 180000g/mol to 250000g/mol; the vitrified micro bubble has compressive strength not less than 3.5MPa and particle size of 0.8-1.2 mm.
The preparation method comprises the steps of putting the polylactic acid, the polyurethane thermoplastic elastomer, the dicyclohexyl phthalate and the recycled paper fiber which are weighed according to mass into ethanol for blending, stirring for 30min at 210 ℃ under the condition of 300 r/min, taking out, naturally cooling to room temperature, and vacuumizing and drying to obtain a standby intermediate product; blending the standby intermediate product, PP reclaimed materials and a plasticizer DINP, wherein the blending temperature is controlled to be 90 ℃ in a high-speed blender for blending treatment for 20min during blending operation, and after the treatment is finished, the mixture is fed into a double-screw extruder for melt blending and then is extruded, the rotating speed of a screw is controlled to be 300 revolutions per minute for three-section extrusion, and the extrusion temperatures of the three-section extrusion are respectively 170 ℃ for 55S,190 ℃ for 110S and 170 ℃ for 20S; and then drying, cooling and granulating the extrudate to obtain plastic particles, blending the plastic particles with vitrified microbeads and color master batches, performing secondary extrusion granulation by using another double-screw extruder after blending, controlling the screw rotating speed of the other double-screw extruder to be 400 rpm and the extrusion temperature to be 190 ℃, extruding, keeping the residence time of an extrusion section to be 120S, and then drying, cooling and granulating the extrudate to obtain the granule of the finished regenerated packaging material.
Example III
The regenerated packaging material comprises the following raw materials in mass proportion: PP reclaimed materials: 60kg, polylactic acid: 30kg, recycled paper fiber: 20kg, polyurethane thermoplastic elastomer: 12kg of dicyclohexyl phthalate: 8kg, plasticizer DINP:12kg, vitrified microbeads: 6kg, 1kg of color masterbatch, wherein the auxiliary materials are the combination of cellulose diacetate grafted polylactic acid, transesterification catalyst and antioxidant 1076; wherein the dosage of the diacetyl cellulose grafted polylactic acid is 1.5wt% of the polylactic acid; the dosage of the transesterification catalyst is 1wt% of the sum of the masses of polylactic acid, polyurethane thermoplastic elastomer and dicyclohexyl phthalate; the amount of antioxidant 1076 was 0.3wt% based on the total mass of all raw materials.
The preparation method comprises the steps of firstly crushing the recovered PP waste particles into particles with the particle diameter of less than 3mm by using crushing equipment, then cleaning by using high-pressure water flow, filtering after cleaning, drying by hot air at the temperature of 60 ℃ after removing impurities by sieving to obtain PP waste particles with the purity of 95%, heating the PP waste particles into a molten state, adding unsaturated polyester resin accounting for 6wt% of the mass of the particles as a toughening agent, blending, extruding and granulating to obtain the PP regenerated material; the polylactic acid is a mixture of poly L-lactic acid and poly D-lactic acid with a mass ratio of 1:1, and the weight average molecular weight of the polylactic acid mixture is 200000 g/mol-250000 g/mol; the vitrified micro bubble has compressive strength not less than 3.5MPa and particle size of 0.8-1.0 mm.
The preparation method comprises the steps of putting the polylactic acid, the polyurethane thermoplastic elastomer, the dicyclohexyl phthalate and the recycled paper fiber which are weighed according to mass into ethanol for blending, stirring for 40min at 180 ℃ under the condition of 260 r/min, taking out, naturally cooling to room temperature, and vacuumizing and drying to obtain a standby intermediate product; blending the standby intermediate product with PP reclaimed materials, a plasticizer DINP and auxiliary materials, wherein the blending temperature is controlled to be 80 ℃ in a high-speed blender for 25 minutes during blending operation, and the mixture is fed into a double-screw extruder for melt blending and then extrusion, the rotating speed of a screw is controlled to be 550 r/min for three-section extrusion, and the extrusion temperatures of the three-section extrusion are respectively 160 ℃ for 55S,180 ℃ for 110S and 180 ℃ for 25S; and then drying, cooling and granulating the extrudate to obtain plastic particles, blending the plastic particles with vitrified microbeads and color master batches, performing secondary extrusion granulation by using another double-screw extruder after blending, controlling the screw rotating speed of the other double-screw extruder to be 500 revolutions per minute and the extrusion temperature to be 180 ℃ for extrusion, controlling the residence time of an extrusion section to be 130S, and then drying, cooling and granulating the extrudate to obtain the granule of the finished regenerated packaging material.
Example IV
The regenerated packaging material comprises the following raw materials in mass proportion: PP reclaimed materials: 65kg, polylactic acid: 35kg, recycled paper fiber: 24kg, polyurethane thermoplastic elastomer: 14kg of dicyclohexyl phthalate: 10kg, plasticizer DINP:12kg, vitrified microbeads: 6kg, 2kg of color masterbatch, wherein the auxiliary materials are the combination of an ester exchange catalyst and an antioxidant 1076; wherein the dosage of the transesterification catalyst is 2wt% of the sum of the mass of the polylactic acid, the polyurethane thermoplastic elastomer and the dicyclohexyl phthalate; the amount of antioxidant 1076 was 0.4wt% based on the total mass of all raw materials.
The preparation method comprises the steps of firstly crushing the recovered PP waste particles into particles with the particle diameter of less than 3mm by using crushing equipment, then cleaning by using high-pressure water flow, filtering after cleaning, drying by hot air at the temperature of 55 ℃ after removing impurities by sieving to obtain PP waste particles with the purity of 94%, heating the PP waste particles into a molten state, adding unsaturated polyester resin accounting for 7wt% of the mass of the particles as a toughening agent, blending, extruding and granulating to obtain PP regenerated materials; the polylactic acid is a mixture of poly L-lactic acid and poly D-lactic acid with a mass ratio of 1:3, and the weight average molecular weight of the polylactic acid mixture is 180000 g/mol-260000 g/mol; the vitrified micro bubble has compressive strength not less than 3.5MPa and particle size of 1.0-1.2 mm.
The preparation method comprises the steps of putting the polylactic acid, the polyurethane thermoplastic elastomer, the dicyclohexyl phthalate and the recycled paper fiber which are weighed according to mass into ethanol for blending, stirring for 38min at 180 ℃ under the condition of 280 revolutions per minute, taking out, naturally cooling to room temperature, and vacuumizing and drying to obtain a standby intermediate product; blending the standby intermediate product with PP reclaimed materials, a plasticizer DINP and auxiliary materials, wherein the blending temperature is controlled to be 85 ℃ in a high-speed blender for blending treatment for 20min during blending operation, and after the treatment is finished, the mixture is fed into a double-screw extruder for melt blending and then is extruded, the rotating speed of a screw is controlled to be 600 r/min for three-section extrusion, and the extrusion temperature of the three-section extrusion is respectively 160 ℃ for 45S,190 ℃ for 100S and 180 ℃ for 20S; and then drying, cooling and granulating the extrudate to obtain plastic particles, blending the plastic particles with vitrified microbeads and color master batches, performing secondary extrusion granulation by using another double-screw extruder after blending, controlling the screw rotating speed of the other double-screw extruder to be 600 revolutions per minute and the extrusion temperature to be 180 ℃ for extrusion, keeping the residence time of an extrusion section to be 140S, and then drying, cooling and granulating the extrudate to obtain the granule of the finished regenerated packaging material.
The regenerated packaging material prepared by the embodiment has mechanical properties similar to those of a newly-manufactured PP (polypropylene) product when being reprocessed into a packaging material finished product, has better surface elasticity, flexural modulus and tensile strength, and better adsorptivity, can be used for adsorbing odor of the packaging product and moisture in the package, and is particularly suitable for packaging electronic products, plastic products and fruits and vegetables.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the foregoing description is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and all equivalent structures or equivalent process modifications made by the teachings of the present invention, or direct or indirect application in other related technical fields, are equally included in the scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The regenerated packaging material is characterized by comprising the following raw materials in parts by mass:
PP reclaimed materials: 55-70 parts by mass;
polylactic acid: 20-40 parts by mass;
and (3) recycling paper fibers: 15-30 parts by mass;
polyurethane thermoplastic elastomer: 10-15 parts by mass;
dicyclohexyl phthalate: 7-15 parts by mass;
plasticizer DINP: 10-15 parts by mass;
vitrified microbeads: 5-7 parts by mass;
color master batch: 0 to 2 parts by mass;
auxiliary materials;
the PP regenerated material is obtained in the following way: crushing the recovered PP waste particles into particles with the particle diameter of less than 3mm, cleaning the corresponding particles by high-pressure water flow, recovering and filtering, drying at low temperature, heating to a molten state, adding unsaturated polyester resin accounting for 5-7wt% of the particles as a toughening agent, blending, extruding and granulating to obtain PP regenerated materials;
the preparation method comprises the following operation steps:
s1, putting polylactic acid, polyurethane thermoplastic elastomer, dicyclohexyl phthalate and recycled paper fiber into ethanol for blending, stirring for 30-45 min at the temperature of 150-210 ℃, controlling the stirring speed to be 200-300 r/min, taking out, naturally cooling to room temperature, and vacuumizing and drying;
s2, blending the dried product obtained in the step S1 with PP regenerated material, plasticizer DINP and auxiliary materials, and extruding and granulating by using a double screw extruder after blending;
and S3, blending the obtained plastic particles with vitrified microbeads and color master batches, and carrying out secondary extrusion granulation by using another double-screw extruder after blending to obtain the particles of the finished regenerated packaging material.
2. The recycled packaging material according to claim 1, wherein the polylactic acid is a proportional composition of poly-L-lactic acid and poly-D-lactic acid, and the weight average molecular weight of the polylactic acid is 120000g/mol to 300000g/mol.
3. The recycled packaging material according to claim 1, wherein the vitrified micro bubbles have a compressive strength of 3.5MPa or more and a particle size of 0.5 to 1.2 mm.
4. The recycled packaging material according to claim 1, wherein the auxiliary material comprises one or a combination of a cellulose diacetate grafted polylactic acid, a transesterification catalyst and an antioxidant 1076;
the dosage of the diacetyl cellulose grafted polylactic acid is 1.5 to 2.5 weight percent of the polylactic acid; the dosage of the transesterification catalyst is 1-3wt% of the sum of the mass of polylactic acid, polyurethane thermoplastic elastomer and dicyclohexyl phthalate; the dosage of the antioxidant 1076 is 0.3-0.5 wt% of the total mass of all raw materials.
5. The recycled packaging material according to claim 1, wherein the blending operation is performed in step S2 and step S3, the blending temperature is 75 to 90 ℃, and the blending treatment time is 15 to 30 minutes.
6. The recycled packaging material according to claim 1, wherein in step S2, three-stage extrusion is performed by setting a screw rotation speed of 300 to 600 rpm on a twin screw extruder, wherein the extrusion temperatures of the three-stage extrusion are respectively 160 to 170 ℃ for 45 to 60S,170 to 190 ℃ for 90 to 120S, and 170 to 190 ℃ for 20 to 30S.
7. The recycled packaging material according to claim 1, wherein in the step S2, extrusion is performed by using a twin-screw extruder, wherein the twin-screw extruder is provided with a screw rotation speed of 300 to 600 rpm and an extrusion temperature of 170 to 190 ℃, and the residence time of the extrusion section is 120 to 150S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211220610.3A CN116023738A (en) | 2022-10-08 | 2022-10-08 | Regenerated packaging material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211220610.3A CN116023738A (en) | 2022-10-08 | 2022-10-08 | Regenerated packaging material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116023738A true CN116023738A (en) | 2023-04-28 |
Family
ID=86074700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211220610.3A Pending CN116023738A (en) | 2022-10-08 | 2022-10-08 | Regenerated packaging material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116023738A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993558A (en) * | 2009-08-09 | 2011-03-30 | 陈天云 | Thin film produced by using starch fiber waste plastic |
| CN104292785A (en) * | 2014-10-29 | 2015-01-21 | 正业包装（中山）有限公司 | Recycled paper fiber-polylactic acid composite material and preparation method thereof. |
| CN104650452A (en) * | 2014-08-07 | 2015-05-27 | 柳州蓓蒂芬科技有限公司 | Preparation method of plant microfine fibers/rubber powder/polypropylene thermal stretch composite material |
| CN111621086A (en) * | 2019-02-27 | 2020-09-04 | 合肥杰事杰新材料股份有限公司 | Waste plant fiber modified regenerated polypropylene composite material and preparation method thereof |
| CN113913967A (en) * | 2021-11-24 | 2022-01-11 | 安徽大学 | Preparation method of recycled polypropylene/polylactic acid high-strength composite material |
-
2022
- 2022-10-08 CN CN202211220610.3A patent/CN116023738A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993558A (en) * | 2009-08-09 | 2011-03-30 | 陈天云 | Thin film produced by using starch fiber waste plastic |
| CN104650452A (en) * | 2014-08-07 | 2015-05-27 | 柳州蓓蒂芬科技有限公司 | Preparation method of plant microfine fibers/rubber powder/polypropylene thermal stretch composite material |
| CN104292785A (en) * | 2014-10-29 | 2015-01-21 | 正业包装（中山）有限公司 | Recycled paper fiber-polylactic acid composite material and preparation method thereof. |
| CN111621086A (en) * | 2019-02-27 | 2020-09-04 | 合肥杰事杰新材料股份有限公司 | Waste plant fiber modified regenerated polypropylene composite material and preparation method thereof |
| CN113913967A (en) * | 2021-11-24 | 2022-01-11 | 安徽大学 | Preparation method of recycled polypropylene/polylactic acid high-strength composite material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2268737B1 (en) | Polyester compositions and method for preparing articles by extrusion blow molding | |
| KR101785753B1 (en) | Ultra-high iv polyester for extrusion blow molding and method for its production | |
| US20030092793A1 (en) | Process for the preparation of biodegradable resin | |
| JP7288060B2 (en) | Manufacturing method for high-magnification polylactic acid foam sheet material | |
| CN102241862A (en) | Preparation of water resistant polyvinyl alcohol biodegradable film through melt extrusion method | |
| CN101591467A (en) | A kind of polylactic wood/plastic composite material and preparation method thereof | |
| CN1575226A (en) | Moulding comprising plastic and reinforced by natural fibre | |
| CN1919918A (en) | Absorbent toughening masterbatch for plastic contour machining and preparation method thereof | |
| CN102504504B (en) | High-impact-resistance heat-resistant polylactic acid alloy material and preparation method thereof | |
| CN109535674A (en) | Using the PPC/PLA/PBAT blending and modifying Biodegradable resin and preparation method thereof of chain extender preparation | |
| CN112210196A (en) | Biodegradable polylactic acid product and preparation method thereof | |
| CN1786072A (en) | Polycomponent combined degradable foamed plastic and its preparation method | |
| CN112341655A (en) | Full-biodegradable blown film composite material with high polylactic acid content and preparation method thereof | |
| CN100592979C (en) | Polyolefin complete transparent master batch and preparation thereof | |
| CN116023738A (en) | Regenerated packaging material | |
| CN1951994A (en) | Transparent film masterbatch and its preparing method | |
| CN117106289A (en) | Thermoplastic composite laminated material and preparation method thereof | |
| CN104231512A (en) | Preparation method of degradable wood-plastic composite material and degradable wood-plastic composite material | |
| CA2607216C (en) | Extrudable polyethylene terephthalate blend | |
| CN107151458A (en) | A kind of inexpensive stalk polyethylene film and preparation method thereof | |
| CN113788980B (en) | Pre-swelling continuous extrusion foaming polylactic acid material and preparation method and application thereof | |
| EP4137285A2 (en) | Method for preparing a biodegradable polymeric composition comprising thermoplastic starch and a synthetic biodegradable polymer | |
| CN111995834A (en) | Modified particle based on PVA/starch and preparation method thereof | |
| CN115181402B (en) | Copolyester composition easy to extrude and blow and preparation method thereof | |
| CN1772792A (en) | Solid phase polymerization process for preparing ethylene telephthalate and dihydric alcohol copolymer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |